round to more javascript code example

Example 1: javascript round to nearest 10

var rounded = Math.round(number / 10) * 10

Example 2: round down the number javascript

+3.5 => +3.0
-3.5 => -4.0

+3.5 => +3.0 using Math.floor()
-3.5 => -3.0 using Math.ceil()